Ahh I see. A 2.5 drive has the same connector as a 3.5 one? With IDE drives the connector was smaller and combined the power pins. SATA only changes in form factor for optical drives. Wasn't sure about SCSI though as I've never personally seen or used one in that form factor. That and the newer 68/80 pin drives I definitely have no experience with.

I think the 50 pin drives change in pin count for the 2.5 drives. I just don't know about the newer 68/80 pin SCSI drives...

Yeah a 2.5 drive should be fine then, they are smaller and probably have a smaller heat and power footprint compared to the larger 3.5 ones. Hard to imagine how they managed to fit a 10k drive into a laptop sized drive.